Anyone's guess is as good as any on this one. Dubious, to say the least.
All of this is within the scope of past experience with Iran (just ask their neighbors), but isn't it a bit troubling to lack confidence you can trust what US officials are saying about this as well?
On the audio (mp3) of the radio communication, a voice slowly pronounces the words "I am coming to you," and then as the American tries to communicate, says, "You will explode after a few minutes."
But since then, the American version of the incident has undergone a revision. The radio threat, the Navy now admits, may not have come from the Iranian boats after all. The voice, a number of observers have pointed out, seems to come out of nowhere and doesn't have the expected engine noise in the background, and in fact, The Washington Post reports, the accent doesn't even sound Iranian.
Thank The President.
UPDATE: Things get really weird.